Analog and Digital Electronics

1. The binary number 10101 is equivalent to decimal number

• 19

• 12

• 27

• 21

Which of the following are the components of 555 times?

• Flilflop

• Transistor

• both

• None

what is the gain of an idea op-amp

• 0

• 1

• 10

• Infinite

The NOR gate is OR gate followed by

• AND

• NAND

• OR

• NOT

 A device which converts BCD to seven segments is called ……..

• Multiplexer

• Encoder

• Decoder

• None of these

BCD input 1000 is fed to a 7 segment display through a BCD to 7 segment decoder/driver. The segments which will lit up are ………….

• a,b,c

• all

• d,e,

• a,e,c

A full adder can be made out of

• two half adders

• two half adders and a OR gate

• two half adders and a NOT gate

• three half adders

The output of a half adder is

• sum

• carry

• sum and carry

• none

Maxterm designation for A + B + C is

• M0

• M7

• M3

• M2

2’s complement of binary number 0101 is

• 0111

• 1100

• 1011

• 1101